Raycast not working in orthographic camera mode

Help & Support
#1

I am trying to use the raycast function a.e.
this.cameraEntity.camera.screenToWorld(screenPosition.x, screenPosition.y, this.cameraEntity.camera.farClip, this.ray.direction);
in my project… works fine as long as the camera is in perspective mode - as soon as it is orthographic the raycast gives nothing back - is this a known bug? Is there a workaround?

thx,

Pep

Orthographic projection camera and raycasts
#2

I just tested this and it seems to work fine. Here’s a script I added to my camera:

var Ray = pc.createScript('ray');

// initialize code called once per entity
Ray.prototype.initialize = function() {
    this.app.mouse.on('mousemove', this.onMouseMove, this);
    this.rayStart = new pc.Vec3();
    this.rayEnd = new pc.Vec3();
    this.green = new pc.Color(0, 1, 0);
    this.red = new pc.Color(1, 0, 0);
};

Ray.prototype.onMouseMove = function(e) {
    var farClip = this.entity.camera.farClip;
    var nearClip = this.entity.camera.nearClip;
    this.entity.camera.screenToWorld(e.x, e.y, nearClip, this.rayStart);
    this.entity.camera.screenToWorld(e.x, e.y, farClip, this.rayEnd);
    
    var result = this.app.systems.rigidbody.raycastFirst(this.rayStart, this.rayEnd);
    if (result) {
        this.entity.camera.clearColor = this.green;
    } else {
        this.entity.camera.clearColor = this.red;
    }
};

// update code called every frame
Ray.prototype.update = function(dt) {
    
};

All I did was the following:

  • Create a blank project
  • Add the script above to the Camera entity.
  • Added rigidbody and collision components to the Cube entity.
  • Change the camera to Ortho and tweak the clip planes a bit to get the whole scene rendered
  • Run the scene. The background is red when the mouse isn’t over the cube and green otherwise.
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